Compatibilized blends of thermoplastic polyurethane (TPU) and polypropylene

Qi Wei Lu, Christopher W. Macosko, Jacques Horrion

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

Compatibilized blends of thermoplastic polyurethane (TPU) and polypropylene (PP) were developed using amine (primary or secondary) functionalized PP's (PP-g-NH2 or PP-g-NHR). The strategy of reactive compatibilization is based on fast reactions between amine functional groups and urethane linkages or traces of free isocyanates released by thermal degradation of TPU. Excellent compatibilization between TPU and PP was confirmed by rheological, morphological, and mechanical properties. Much finer domain size, higher interfacial adhesion, and more stable morphologies were clearly observed by scanning electron microscopy. Significant improvements in the overall mechanical properties (tensile, tear, abrasion) imply significantly more reaction between TPU and PP phases in the two TPU/PP blends containing PP-g-NH2 or PP-g-NHR than a TPU/PP blend using PP-g-MA as a compatibilizing agent.

Original languageEnglish (US)
Pages (from-to)221-232
Number of pages12
JournalMacromolecular Symposia
Volume198
DOIs
StatePublished - Aug 1 2003

Keywords

  • Amine functionalized polypropylene
  • Blends
  • Maleated polypropylene
  • Reactive compatibilization
  • Thermoplastic polyurethane (TPU)

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